4388133661 has 2 divisors, whose sum is σ = 4388133662. Its totient is φ = 4388133660.

The previous prime is 4388133611. The next prime is 4388133689. The reversal of 4388133661 is 1663318834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4066612900 + 321520761 = 63770^2 + 17931^2 .

It is a cyclic number.

It is not a de Polignac number, because 4388133661 - 2²¹ = 4386036509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4388133601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2194066830 + 2194066831.

It is an arithmetic number, because the mean of its divisors is an integer number (2194066831).

Almost surely, 2^4388133661 is an apocalyptic number.

It is an amenable number.

4388133661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4388133661 is an equidigital number, since it uses as much as digits as its factorization.

4388133661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 4388133661 is about 66242.9895234205. The cubic root of 4388133661 is about 1637.1681325478.

The spelling of 4388133661 in words is "four billion, three hundred eighty-eight million, one hundred thirty-three thousand, six hundred sixty-one".